package com.haoyu.config;

import com.haoyu.entity.MyShiroRealmS;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

/**
 * @author: 蒿雨
 * @create: 2022-01-06 17:04
 * @description:
 */
@Configuration
public class ShiroConfig {
        @Bean
        public ShiroFilterFactoryBean shirFilter(SecurityManager securityManager) {
            System.out.println("ShiroConfiguration.shirFilter()");
            ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
            shiroFilterFactoryBean.setSecurityManager(securityManager);
            // 拦截器.
            Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
            // 配置不会被拦截的链接 顺序判断
            filterChainDefinitionMap.put("/static/**", "anon");
            // 配置退出 过滤器,其中的具体的退出代码Shiro已经替我们实现了
            filterChainDefinitionMap.put("/logout", "logout");
            // <!-- 过滤链定义，从上向下顺序执行，一般将/**放在最为下边 -->:这是一个坑呢，一不小心代码就不好使了;
            // <!-- authc:所有url都必须认证通过才可以访问; anon:所有url都都可以匿名访问-->
            filterChainDefinitionMap.put("/**", "authc");
            // 如果不设置默认会自动寻找Web工程根目录下的"/login.jsp"页面
            shiroFilterFactoryBean.setLoginUrl("/login");
            // 登录成功后要跳转的链接
            shiroFilterFactoryBean.setSuccessUrl("/index");

            //未授权界面;
            shiroFilterFactoryBean.setUnauthorizedUrl("/403");
            shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
            return shiroFilterFactoryBean;
        }

        /**
         * 凭证匹配器
         * （由于我们的密码校验交给Shiro的SimpleAuthenticationInfo进行处理了）
         *
         * @return
         */
        @Bean
        public HashedCredentialsMatcher hashedCredentialsMatcher() {
            HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
            hashedCredentialsMatcher.setHashAlgorithmName("md5"); // 散列算法:这里使用MD5算法;
            hashedCredentialsMatcher.setHashIterations(2); // 散列的次数，比如散列两次，相当于 md5(md5(""));
            return hashedCredentialsMatcher;
        }

        @Bean
        public MyShiroRealmS myShiroRealm() {
            MyShiroRealmS myShiroRealm = new MyShiroRealmS();
            myShiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
            return myShiroRealm;
        }


        @Bean
        public SecurityManager securityManager() {
            DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
            securityManager.setRealm(myShiroRealm());
            return securityManager;
        }

        /**
         * 开启shiro aop注解支持.
         * 使用代理方式;所以需要开启代码支持;
         *
         * @param securityManager
         * @return
         */
        @Bean
        public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
            AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
            authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
            return authorizationAttributeSourceAdvisor;
        }

        @Bean(name = "simpleMappingExceptionResolver")
        public SimpleMappingExceptionResolver
        createSimpleMappingExceptionResolver() {
            SimpleMappingExceptionResolver r = new SimpleMappingExceptionResolver();
            Properties mappings = new Properties();
            mappings.setProperty("DatabaseException", "databaseError"); // 数据库异常处理
            mappings.setProperty("UnauthorizedException", "403");
            r.setExceptionMappings(mappings);  // None by default
            r.setDefaultErrorView("error");    // No default
            r.setExceptionAttribute("ex");     // Default is "exception"
            //r.setWarnLogCategory("example.MvcLogger");     // No default
            return r;
        }
    }
